A question about my barrel

[Ace Lungger]

Howdy Pards,
I picked up this nice Swede 1867 Rolling Block action with a new 45-70 barrel, that was made and installed in 1995, I can never remember the gun smiths name that done the work, I think he was from Kalspiel MT, he is in a rest home, and his daughter is trying to sell the buiness. Anyway I made a extractor and installed it, wood will be here next week, and i am getting ready to put the breech block in the mill vice and change it to center fire.

My question is, this barrel is 34" long and 18 twist mico grooved, I am going to shoot a 500 grain bullet with Black Powder! How do the Micro Grooved barrels do! Do they foul up worse, do they lead up faster, and on a norm do they shoot good?
I would be great full for any and all advice!
Thanks
ACE

[John Taylor]

Sounds like you are talking about a Bauska barrel, I didn't know he did micro groove. Bauska has made barrels in Kalispell for many years and is well known for his low cost barrel. The last time I ordered a barrel from them I talked to a guy named Steve, this was several years back. What I have heard about micro groove barrels ( Marlin) is that they don't do to well with cast bullets. I have never tested them myself so may not have a good answer. Best to try it and see what happens. If it don't shoot cast try some jacketed bullets after you make sure there is no lead in the bore.

[Angel_Eyes]

I run a Marlin .44Mag lever gun with microgroove rifling which absolutely loves hard cast bullets, ( almost pure Lynotype).
This is a Lyman 210gr gascheck bullet but the heel for the gascheck milled out to give 230gr, pushed by 7.6gr Alliant Unique.
This gives 1080fps +/- 5 over the chrono. Absolute tack driver. POA at 25yd, 4" drop at 50, 8" drop at 100yd, CONSISTANT.
How the microgroove rifling works with holy black I dont know, but good luck finding out!

UKshooter.

[Ace Lungger]

 :)Howdy Pards<
JT, you are right Lee Bauska in 1995, someone started this project and stopped for some reason, and then another guy boght it years ago, and didn't do anything with it, so i traded him out of it, and i plan on shooting it in to weeks or so>
JT, I was also told that Lee never made micro grooved barrels, and friend of mine looked threw it, and said it was micro grooved! I think it has a lot of groves like 8 and they are very thin rifling.
UK, I have heard both good and bad about the micro groove barrels, it realy doesn't matter, I own it and am going to shoot it!

Thanks for all the help!
ACE

[Wolfgang]

The shallow grooved insert I had in my SxS would not group with soft bullets.  I tried hollow based paper patched and did not better.  I figure a very hard cast bullet will work.  Don't know when I'll get around to trying that, but plan to one day.  

Let us know how you do with the shallow rifling.  

Good shootin', . . . .

My side by side conversion:
www.drburkholter.com/cf9.html